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2011 | 21 | 3 | 487-498
Tytuł artykułu

A sign preserving mixed finite element approximation for contact problems

Autorzy
Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
This paper is concerned with the frictionless unilateral contact problem (i.e., a Signorini problem with the elasticity operator). We consider a mixed finite element method in which the unknowns are the displacement field and the contact pressure. The particularity of the method is that it furnishes a normal displacement field and a contact pressure satisfying the sign conditions of the continuous problem. The a priori error analysis of the method is closely linked with the study of a specific positivity preserving operator of averaging type which differs from the one of Chen and Nochetto. We show that this method is convergent and satisfies the same a priori error estimates as the standard approach in which the approximated contact pressure satisfies only a weak sign condition. Finally we perform some computations to illustrate and compare the sign preserving method with the standard approach.
Rocznik
Tom
21
Numer
3
Strony
487-498
Opis fizyczny
Daty
wydano
2011
otrzymano
2010-11-08
poprawiono
2011-01-30
poprawiono
2011-03-21
Twórcy
autor
  • Besançon Laboratory of Mathematics, UMR CNRS 6623, Franche-Comté University, 16 route de Gray, 25030 Besançon, France
Bibliografia
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